htaccess add .php to everything without an extension already

Question

I'm looking around SO for duplicates, but I'm having trouble finding what I think should be a simple answer.

What are the rewrite rules to add .php to anything without an extension already?

examples:

www.website.com/styles.css -> www.website.com/styles.css

www.website.com/login -> www.website.com/login.php

THANKS!

Answer 1

The following may suit your needs:

RewriteEngine On
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.+)$ $1.php [L]

This will automatically add the .php extension to filenames without extensions. It may attempt to rename something.css to something.css.php, but will only do so if something.css.php exists.

Answer 2

To expand on the answer by @quinxorin you could also do the following.

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteCond %{REQUEST_FILENAME}\.php ^(.*)\.php(.*)$
RewriteRule .* %1.php?%2 [QSA]

This appends the remainder of the url to the result. ie /page/1234 becomes /page.php?1234.